Weight comes from uptime, observed behaviour and the trust graph. Never from a resource money can buy.
Blocks, transactions, accounts and contracts — read straight off the chain.
A safe-by-default high-level language that compiles into the low-level tier you can also write by hand.
The network coin. Nine decimals, unsigned 64-bit amounts, no floating point anywhere near it.
Protocol releases, engineering notes and decisions on record
Two honest nodes must agree on the last bit. Floating point cannot promise that across compilers and hardware, so the core is integer-only end to end.